RE:640x480? Anyone stuck on that display mode?
Juro, have you got any user stats for the site?
On a little literary press web site I maintain, the stats indicate that 55.56% of visitors have a screen res of 800 x 600, 20.81% have 640 x 480, and 15.82% have 1024 x 768. YMMV (your mileage may vary)!
I use a free tracker service called eXTReMe tracking, and have been very happy with it. Anyone can see the stats by going to the page at <!--http--><a href="http://www.sentex.net/~pql" target="_blank">http://www.sentex.net/~pql</a><!--url--> and clicking on the little blue planet symbol at the bottom of the page. If you pay them, you can get (private) tracking for your whole site. I'm not affiliated, just a happy user.